Fangrui Product Details [hdmi Arc Audio Extractor]audio Return Channel Function And Audio Extract To Digital And Analog Signal.that Means, When Connected To Hdmi Arc Device,such As Your Tv With Hdmi Arc Port,audio Will Be Return From Tv And Output To Spdif,coaxial,l+r Rca,3.5mm;note: Please Set Your Tv Audio Output To Pcm, Lpcm [192khz Dac Digital To Analog Converter]input Spdif Or Coaxial Digital Signal,output To L+r Analog Audio,3.5mm Jack Stereo Sound;note: Please Set Your Tv Audio Output To Pcm, Lpcm [hdmi Arc Cec Volume Adjustable]when Switch To Hdmi Arc Mode, Volume Can Be Countrolled By Tvs Remote Controller (attention: Cec Is Only For Hdmi 1.4 Version Or Ab Ove,both Of Your Device And Hdmi Cable Must Be Required,dont Forget To Set The Cec Control Configurations Of Your Tv,or Else Not Available For Volume Control) [spdif To Coaxial Bidirection Converter]spdif (toslink/optical) Convert To Coaxial, Coaxial Convert To Spdif(toslink/optical); [mini Size And Easy To Use]aluminum Shell,small Size,portable,compatible With For B